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Detail publikace
ŠIKULA, J., PAVELKA, J., MAJZNER, J., DOBIS, P.
Originální název
Cracks Characterisation by Acoustic and Electromagnetic Emission
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
angličtina
Originální abstrakt
The simultaneous investigation of an electromagnetic (EME) and acoustic (AE) emission in solids is described. This method can give additional information on crack creation kinetic and improve crack localisation and its parameters assessment. Granite samples were loaded with a constant stress rate up to their failure and AE and EME signals measured in four channel set-up. Both signals show different behaviour in the first interval of about 10 ms just after crack creation, where high frequency components corresponding to crack walls vibration are dominant, and in the remaining period of about 300 ms where the detected signals time dependence is given mainly by whole sample eigen-vibrations. The EME signal on-set defines exactly the time of crack creation and from the time delay of recorded AE signals the crack position can be determined. The observed high frequency signal of several MHz corresponds to crack length of the order of 1 mm.
Klíčová slova
Acoustic emission, electromagnetic emission, cracks
Autoři
Rok RIV
2002
Vydáno
1. 9. 2002
Nakladatel
Czech Society for Non-destructive Testing
Místo
Brno
ISBN
80-214-2174-6
Kniha
EWGAE 2002 Proceegings
Číslo edice
1.
Strany od
II/164
Strany počet
7